No, that’s in the callback, so wouldn’t have any effect on whether the instance is created or not. But it would have produced an error if the callback ran (I’m guessing the callback function wasn’t being called while testing this).

Solved the issue! Make sure to check the ImageId, the one in the Amazon example doesn’t exist. I’ve changed it too: ami-7b3db00c. When using the Amazon Linux AMI 2014.09.2 (HVM) - ami-9d23aeea as an alternative it didn’t like the fact it was HVM. ami-7b3db00c is an PV image.